diff --git a/op-monitorism/withdrawals/cli.go b/op-monitorism/withdrawals/cli.go
index 340a1b19..bc66492a 100644
--- a/op-monitorism/withdrawals/cli.go
+++ b/op-monitorism/withdrawals/cli.go
@@ -66,10 +66,10 @@ func CLIFlags(envVar string) []cli.Flag {
 			EnvVars: opservice.PrefixEnvVar(envVar, "EVENT_BLOCK_RANGE"),
 		},
 		&cli.Uint64Flag{
-			Name:     StartingL1BlockHeightFlagName,
-			Usage:    "Starting height to scan for events",
-			EnvVars:  opservice.PrefixEnvVar(envVar, "START_BLOCK_HEIGHT"),
-			Required: true,
+			Name:    StartingL1BlockHeightFlagName,
+			Usage:   "Starting height to scan for events",
+			EnvVars: opservice.PrefixEnvVar(envVar, "START_BLOCK_HEIGHT"),
+			Value:   0,
 		},
 		&cli.StringFlag{
 			Name:     OptimismPortalAddressFlagName,